It began with the first neanderthal who lit his mammoth-bone pipe over a methane vent in LaBrea and rocketed himself into Laguna Hills: Human propulson. After that, man developed more advanced forms of transport propelled by steam, electricity, coal, wombat feces, petroleum, turbines, french-fry oil and hydrogen — and hybrid-drive combinations of those sources. Now, two centuries of man's propulsive experiments will be on display at the Petersen Automotive Museum in Los Angeles starting later this week. The exhibition will feature an array of electric, hydrogen and turbine vehicles from history, and new propulsion technologies that may emerge in the future. Sadly, the Laguna Hills Express didn't survive the ice age.